Clock-escapement



H. C. SAUL.

CLOCK ESCAPEMENT.

APPLICATDON FILED FEB-8,1921.

Patented Oct. 25, 1921.

unllIlIll INVENTOB 151401.

ATTORNEYS UNITED STATES HENRY C. SAUL, OF DOUGLAS, WYOMING.

CLOCK-ESCAPEMENT.

Specification of Letters Patent.

izmiw.

Patented Oct. 25, 1921.

Application filed February 8, 1921. Serial No. 443,403.

To all whom it may concem:

Be it known that I, HENRY C. SAUL, a citizen of the United States, and a resident of Dou 'las, in the county of Converse and State of Wyoming, haveinvented a new and ImprovedClock-Escapement, of which the following is a description.

My invention has for its general object to provide a novel clock escapement so arran ed that a smooth and accurate operation of t e parts will result and friction be reduced to a minimum. 7

The invention resides in distinctive features characterizing my improved pallet and in a novel device functioning imparting impulses to the pendulum in response to the operations of the scape Wheel, as well as in the manner of coordinating the reciprocal operations of the pendulum and pallet with a view to maximize the precision of the pallet movements through the contral of the impulse device.

More specifically the invention embodies means to adjust the impulse device to regulate its engagement. with the scape wheel and means to manually Vary the amplitude of movement of the pallet.

The distinctive features of the invention and its advantages will clearly appear from the specific descri tion following.

Reference is to be had to the accompanying drawings forming a part of this specification, it bein understood that the drawings are merely iliustrative of one example of the invention.

Figure 1 is an elevation of a clock escapement embodying my invention;

Fig. 2 is a view at right angles to Fig. 1;

Fig. 3 is a view similar to Fig. 1 with the parts in changed positions in accordance with the reverse movement of the pendulum;

Fig. 4: is a perspective view of a lever device pertaining to the pallet.

In the illustrated example of my invention the numeral 10 indicates the clock frame; 11, the scape wheel; and 12 the pallet having a jewel locking-pawl 13. 14 indicates the pendulum suspended from frame member 10, and 14 indicates the pendulum lever, said lever being on a rock shaft 15. The shaft 15 at the end opposite that provided with the pendulum lever 14: extends beyond the frame 10 and on the rojecting end is an arm 16 suitably fastened as by a set screw 17 to hold said arm 16 in rigid relation to lever 14 and shaft 15, so that the said arm and lever may have corresponding oscillati ons. At its lower end the arm 16 is provlded with a jewel 18 to be engaged successively by the teeth of the scape wheel 11 to be actuated by the latter, said arm 16 thus constituting an impulse device for the en dulum. The projecting end of shaft 15 extends through an arm 19 pivoted at one end on frame 10 as at 20 to have movement in a vertical plane. The arm 19 at the opposite side of the shaft 15 is engaged by an adjusting screw 21 for raising and lowering said arm and thereby straining the shaft 15 sufliciently to raise or lower the impulse device 16 for properly positioning its jewel 18 relatively to the path described by the teeth of scape wheel 11.

The pallet 12 is pivotally mounted between its ends on the frame 10 by a screw 24 or other means, the lower longer arm being provided with the locking jewel 13 to alternately engage and release successive teeth of scape wheel 11. On the upper shorter arm of the pallet is a lever device or element 26 pivoted at its inner end to the pallet as at 27 to rock in a vertical plane parallel with the pallet. The free end of the pivoted element 26 is provided with a protuberant member 28 rising therefrom and advantageously in the form of a jewel, said protuberant member being adapted to be engaged by a laterally projecting pin 29 on the impulse arm 16, in the oscillations of said arm in synchronism with the oscillations of the pendulum 14c and its lever 14*.

The amplitude of movement permitted the pallet 12 may be regulated by a stop screw 30 having a flat and a rounded side and manually turnable in the part 31 appurtenant to the frame 10.

Vith the above described escapement, as the pendulum swings to the left the pin 29 on the impulse arm 16 will contact with the protuberant jewel 28 and raise the pivoted element 26, said pin thereby passing under said element 26 without affecting the pallet 12, and leaving said pallet in locking relation to the scape wheel 11. lVhen the pendulum reaches the limit of the left swing and comes back, bringing with it the impulse arm 16, the pin 29 contacts with the protubera'nt member 28, thereby exerting a downward pressure on the element 26 and the adjacent end of the pallet 12 and disengaging the loeking jewel 13 from the scape wheel, thus releasing said wheel for permitting it to turn forwardly. At this time the impulse arm 16 Will lie adjacent to a tooth of the scape Wheel so that a turning of the latter Will engage the eWel 18 thereby swinging the arm 16 and rocking shaft 15 to impart an impulse to the pendulum through shaft 15 and pendulum lever 14*. When the movement of the impulse arm 16 under the force of the'scape wheel has progressed sufficiently, the pin 29 Willride over the element 26, thereby releasing the pallet 12 and permitting said pallet, under the action of gravity, to again assume the locking position in engagement With a tooth of the scape Wheel 11.

I would state in conclusion that While the illustrated example constitutes a practical embodiment of my invention, I do not limit myself strictly to the mechanical details herein illustrated, since manifestly the same can be considerably varied Without dearture from the spirit of the invention as efined in the appended claims.

Having thus described my invention, I claim i 1. A clock escapement including an oscillating impulse device movable in one direction to actuate the pendulum and movable in the reverse direction by the pendulum, a pallet in the path .of movement of said impulse device and permitting free movement of the latter to the left in response to the gravitational movement of the pendulum, said palletbeing engageable by the impulse device in the reverse movement of the latter to release the scape Wheel from the pallet, said impulse device being engageable by the released scape Wheel to impart an impulse to said device and to the pendulum.

2. In a clock escapement, an oscillating impulse device adapted to be engaged by the scape Wheel and adapted to impart an impulse to the pendulum, a pallet adapted at one end to intermittently engage and release the scape Wheel, and coacting means on the pallet and impulse device engageable in a movement of the impulse device to the left, Without affecting the pallet and serving to act on the pallet for release of the scape Wheel in the reverse 'movement of the impulse device.

3. In a clock escapement, an oscillating impulse device adapted to be engaged by the scape wheel and adapted to impart an im pulse to the pendulum,-a pallet adapted at one end to intermittently engage and release the scape Wheel, an element pi voted on the pallet at the opposite end, a member-0n the impulse device adapted upon a movement of said device to the left to raise said pivoted element Without affecting the pallet and engageable with said pivoted element for the depression of the pallet andithe release of the scape Wheel upon a reverse movement of the impulse device. I

4:. A clock escapement including a rock shaft to Which the pendulum lever is secured, an impulse arm on the shaft at the opposite end adaptedto be engaged by'thescape Wheel to impart an impulse to the pendulum, a pallet acting to lock and release the Wheel in consonance With the oscillations of the impulse device, a pivoted arm through which said shaft extends adjacent to the impulse device, and means to adjust said arm for varying the relation of the impulse device to the scape Wheel.

v HENRY C. SAUL. 

